Appeal No. 97-2763
Application No. 08/580,790
cell checkers 513 extract test cells by recognizing the
virtual identifiers, and then test the test cells for
abnormalities and losses (column 12, lines 19 through 25).
Based upon the foregoing, we agree with appellants’
arguments (Brief, pages 8 through 16) that the claimed steps
are not found in Uchida. As a result thereof, the obviousness
rejection of claims 1 through 8 based on the teachings of
Uchida is reversed.
Philip discloses a digital switching network handling
digital information samples (column 1, lines 38 through 41).
The network includes a receive interface for each incoming
junction path, and a transmit interface for each outgoing
junction path (column 1, lines 41 through 45). “Each receive
interface is arranged to generate an error indicating code for
each information sample received and to pass each information
sample accompanied by its error indicating code to both the
first and second switching sub-networks” (column 1, lines 48
through 52). Each of the transmit interfaces compares each
sample received from the first switching sub-network with that
received from the second switching sub-network, and when the
samples differ uses “the error detecting codes of each sample
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